Sash-balance



(N0 Model.)

o. H. OGUMPAUGH. SASH BALANCE.

Patented Deo, 28, 1897.

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CHARLES H. OCUMPAUGH, OF ROCHESTER, NEW YORK.

SASH-BALANCE.l

SPECIFICATION forming part of Letters Patent No. 596,216, dated December 28,1897. Application filed November 14:, 1896. Serial No. 612,121. (No model.)

To @ZZ whom t may concern:

/Be it known that I, CHARLES H. OCUM- PAUGH, of Rochester, in the county of Monroe and State of New York,have invented a certain new and useful Improvement in Sash-Balances 5 and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the drawings accompanying this application.

My improvement relates to that class of spring-balances in which the tape or cord that holds the sash winds on a spring-actuated drum.

The invention consists in the construction and arrangement of parts hereinafter described, and embodied in the claims.

In the drawings, Figure 1 is a longitudinal vertical section of the device. Fig. 2 is a vertical cross-section of the same in line x of Fig. l. Figs. 3, 4, 5, and 6 are perspective views of the several parts of the device separated.

The invention consists more especially in the construction of the casing and the pintle on which the spring-actuated drum turns.

The casing is composed of two parts A and' B, each made in a single piece of cast metal. The first part A forms what I denominate the cover-plate, and consists of a face-plate d, provided with the usual cord-slot a', a side plate o2, and two inwardly-projecting lugs a3 o3. It also has a rivet-hole a4. The plate A, which covers the hood B and together with it constitutes a complete close inclosing case entirely separate from the drum, is so made that it can be cast complete and ready for use, except that it must subsequently be provided with the hole a4. This result issecured by the particular arrangement of the side plate A2 with respect to the face-plate and the openin gs therein, wherebyT the coverplate, consisting of the integral face and side plates, can be drawn after casting. This is a result of practical value not before attained and impossible in any prior construction. The cover-plate A and hood B are positively .fastened together by the rivet d, and no other fastening is required. Lugs d3 serve to merely determine and maintain the relative situation of the cover-plate and hood in direction parallel to the face-plate,and means acting substan tiall y like these lugs are deemed important, but it is not necessary to employ any fastening between the parts except the rivet d. The second part B forms what I denominate the hood, and consists of a side plate b, a'circular segmental ring b', and a projecting hollow pintle b2, provided with an interior shoulder b3, a rivet-hole being made through the shoulder and the side plate to receive the rivet. These two parts when fitted together form an inclosure in which is located the 'spring-actuated drum D, the latter being covered entirely from sight by the inclosing rim b of the hood. The edges of the rim simply fit loosely over the lugs as a3, but are not attached thereto, the parts being held together by the central rivet hereinafter described.

On the inner face of the spring-actuatedV drum D is a hollow pin c, which enters the pintle b2, its end striking the shoulder b3, as shown in Fig. 2. Through the hole in the pin c and through corresponding holes in the two sides of the case is passed a rivet d, which, after being inserted, is riveted down at both ends, thus securing the two parts A and B of the case together and inclosing the drum. Any desired degree of friction between the drum and plates a2 and b of the parts A B can be secured by varyin g the tightness of the rivet. The rivet, however, does not bear lat erally on the spindle c of the drum. Said spindle has instead an exterior bearing in the spindle b2, whereby it is securely held, said latter spindle being fast to the part B, which is held solidly against the anges a3 CL3 and part A by the rivet, this being the sole function of the rivet, except as it incidentally affects the tension on the drum by drawing said parts A and B toward each other and against the drum more or less closely. Heretofore a screw situated within a drum-spindle has been relied upon to furnish a bearing for the drum. Such screw is liable to be turned by the drum, and thus interfere with the tension of the drum-spring. In such prior construction a second spring was relied upon to produce tension between the casing and drum. By the present improvement this spring is dispensed with and the rivet and casing produce the tension, as stated. In the hollow face of the drum is the ordinary coiled spring E, the inner end being fastened to the pintle b2 of the hood, and thus held stationary. The other IOO or outer end of the spring is fastened to the rim of the drum. The spring is put under tension by uncoiling it. It therefore avoids all friction of parts of the spring upon themselves when put under tension and the consequent strain upon the spring-fastening.

A3 A3 are two lugs cast on the outer side of the face-plate A on each side of the opening a. The object of these lugs is to enable the spring-drum to be located farther forward, thus economizing space and reducing the size of the balance. The spring-drum being set farther forward, the tape may be wound on its exteriorin quantity to extend through the face-plate adjacent said lugs or flanges a3, which in such case protect and guide the tape which may be drawn down parallel with the face-plate and without being drawn across the bottom of the tape-slot. It also enables a greater length of tape to be coiled on the drum without increasing the depth of the mortise,

It may be noted that the rivet d fastens all the parts together in operative relation without the necessity of using any other rivets or separable fastening devices. The rivet is also used in combination with the pintles to properly adjust or brake the springdru1n- This has heretofore been effected by the medium of the periphery of the drum or by a iiange on such periphery; but such constructions either involve aseparate or expensive braking device, or if a flange on the drum bearing on the case is relied upon it is too noisy and the said braking-flange has made necessary an enlargement of the case. These objections are avoided by pintles constructed as herein shown and described, one of them having an interior shoulder to act as a bearing for the end of the other and cooperating with the rivet to furnish a brake for the drum.

This device is practically noiseless in operation, requiring no enlargement of the case, and is simpler and cheaper to manufacture. I'Iaving described my invention, I claim- 1. In a sash-balance the combination of the cover-plate A comprising a face-plate d and a side plate a2 integral therewith, and lugs a3, a3, also integral with the face-plate, each of said lugs being situated in the angle between the face-plate a and the side plate and near the edge of the latter, a hood B having a side plate b and integral therewith a rim b said rim abutting against the face-plate adjacent the lugs and also against the side plate adjacent its edge and having a hollow pintle b2 constituting a bearing for a drum Dsaid drum situated within the casing formed by said cover-plate side plate and face-plate, the drum having a hollow pintle c fitting the hollow pintle b2, and a rivet d uniting the main parts ofthe casing, substantially as described.

2. The combination of the face-plate a integral with the side plate ce2, the hood I3 provided with a spindle b2 having a shoulder, with the drum having a spindle c bearing against the shoulder in said spindle b2 to constitute a brake, substantially as described.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

CHARLES Il. OCUBIPAUGII.

lVitnesses:

R. F. OsGooD, C. R. Oscoop. 

